package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据

        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        //员工数据写入到数据库中
        //service -> mapper
        //有值之后再完成数据库的写入操作
        Employee employee = new Employee();
        //bean copy 工具类
        BeanUtils.copyProperties(employeeDTO,employee);
        //默认密码
        //String defaultPwd = "123456"
        //加密后的密码
        String md5Pwd = DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
        employee.setPassword(md5Pwd);
        //默认状态 0：启用，1：禁用
        employee.setStatus(StatusConstant.ENABLE);
        //创建时间，创建人，修改时间，修改人
        LocalDateTime now = LocalDateTime.now();
        //创建时间
        employee.setCreateTime(now);
        //修改时间
        employee.setUpdateTime(now);
        //创建人
        employee.setCreateUser(BaseContext.getCurrentId());
        //修改人
        employee.setUpdateUser(BaseContext.getCurrentId());
        //调用mapper写入数据库
        employeeMapper.save(employee);
    }

    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        //调用pageHelper，开启分页
        //第一个参数，当前页，第二个参数，当前页显示多少行
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //查询分页
        Page<Employee> page = employeeMapper.page(employeePageQueryDTO);
        //构建最终返回结果
        PageResult pageResult = new PageResult();
        //总记录数
        pageResult.setTotal(page.getTotal());
        //数据
        pageResult.setRecords(page.getResult());
        return pageResult;
    }

    /**
     * 启用禁用
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        //更新人和更新时间
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.upDate(employee);
    }

    @Override
    public Employee getById(Long id) {
        return this.employeeMapper.getById(id);
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //employeeDTO => employee
        BeanUtils.copyProperties(employeeDTO,employee);
        //修改人
        employee.setUpdateUser(employeeDTO.getId());
        //修改时间
        employee.setUpdateTime(LocalDateTime.now());
        //调用mapper
        employeeMapper.upDate(employee);
    }


}
